Which of the following statements is true of recreation?

it is a leisure activity that is essential to physical, mental, and emotional well being.
recreational activities are done for enjoyment, amusement, or pleasure.
both a and b
none of these

It seeks to establish an environment with characteristics that can lead to happiness.

Explanation:

don't worry, but do consult a doctor.

explanation:

having a high metabolism at age 13 is not abnormal.   however, if you are concerned, do consult a doctor.   the doctor may identify a correctable issue, and then you'll have your answer.   in the meantime, there are a few steps you might consider.

first, reflect on just how much physical activity (work out and dancing) you are getting relative to your caloric intake.   keep in mind that if you are interested in gaining weight, you must have a higher caloric intake than output.   second, if eating robust healthy meals is not providing enough calories, you'll need to include high caloric, yet healthy, snacks.   i warn against using an over the counter high-calorie supplement (drink or food) until you have consulted a doctor.